On Tue, Oct 16, 2018 at 3:22 PM, Björn Persson <Bjorn@rombobjörn.se> wrote:
> Ben Rosser <rosser....@gmail.com> wrote:
>> 2) What's the migration strategy look like? Can users on the mailing
>> lists be automatically added to the relevant discourse lists?
>
> Can the mailing lists be transferred from Mailman to Discourse and
> continue to be the *same* mailing list, with the same address and the
> same list ID? Because otherwise you'll break things for subscribers and
> force them to redo their configuration.
>
> Just force-subscribing people to a new mailing list won't cause their
> local programs to handle messages the same way as those from an old
> mailing list. Programs will correctly see a new mailing list that they
> don't know anything about, and everybody will have to tell their
> programs how to handle messages from this new mailing list.
>
> Transitions like this are what the List-ID header field is for. Even if
> the list address changes, the list ID is supposed to remain unchanged,
> so that sorting and filtering rules can recognize the list. But I'm sure
> many people select on the list address instead, so in practice you have
> to preserve both the list ID and the list address to make the transition
> smooth.

Along those same lines, we  have a bunch of permalinks floating about
with the current mailing list. The permalink is available in
hyperkitty UI, as well as a header in the mails. For example the email
I'm replying to has header:

Archived-At: 
<https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/EMXAAJU2KVICBYUQ5DF5IELVAGGMZWOX/>

Ideally these get preserved somehow.

-- 
Chris Murphy
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